Chimney



Nov. 28, 1939. i MORAN 2,181,338

CHIMNEY Filed June 22, 1938 Fig. 2.

- tends above the cap plate I.

Patented Nov. 28, 1939 I ITED STATES.

CHIMNEY I Robert P. Moran, West Orange, N. 'J. Application June 22,1938, Serial No. 215,292

6 Claims. (01. 72590) My invention relates to an appliance which sets in place on the top of a chimney, confining the passage of flue gases through an orifice into a nozzle extending above the chimney top in a manner so as to cause depositsv of smudge to collect on surfaces of the said appliance where such deposits will be carried by the elements, (rain, wind, melting snow, etc.), through passages provided, to the inside of the chimney flue; thereby permitting and causing said deposits to return down inside the chimney.

The object of my invention is to preventsmudge drippings from going down the exterior surfaces of chimneys; as such drippings discolor and mar the appearance of the visible surfaces thereof.

My invention is particularly well adapted to use on chimneys of residences wherein oil, or bituminous coal, is used for fuel.

I attain the object by the appliance illustrated in accompanying drawing, in which- Figure 1 is a vertical view of a chimney, shown partly in section, with the appliance in place; Fig. 2 is a plan view projected orthographically from Fig. 1; Fig. 3 is a detail view of the appliance, cut in half, showing it in isometric form.

Similar numerals refer to throughout the several views. The cap plate I, covers the top of the chimney by setting thereupon in a horizontal, position. Ihe outer edges of the cap plate form flanges 2, or are upturned shown. At the central portion similar parts of the cap plate l, a depressed cavity is formed by the side walls 3, and the orifice plate. 4. The cap plate l, with flanges 2, the side walls 3,.and the orifice plate 4, are constructed in a manner that makes them continuous with each other along lines where the planes of the parts intersect.

The nozzle 6, is supported above, and from, the orifice plate d, by lugs 5; as shown or as may otherwise be desired. The cross-sectional area of the nozzle E, shall preferably be larger than that of the orifices. The top of the nozzle 6, ex-

The passages I, are formed by the clearance between the lower end of nozzle 5, and the upper surface of the orifice plate 1. Passages 8, through orifice plate '4, are located in the region where the pressure of the flue gases below is reduced by virtue of the gas stream contracting as it approaches the orifice 9. An annular space if), is formed by clearance between the outer surface of nozzle 6, and the inner surface of side walls 3. The chimney in itself is not a part of this invention.

The appliance functions as follows:

Flue gases passing up the chimney must pass through orifice 9, and subsequently through nozzle ii in order to reach the atmosphere. Upon leaving nozzle 6, the flue gases deposit smudge, and condensation, about the upper rim of nozzle 6 and upon the upper surface of cap plate I. By virtue of the combined action of the elements of the weather, the flue gas condensation, and the force of gravity, the smudge, which is prevented from going down the outer surface of the chimney by flanges 2, will move through the annular passage l0, downward, through the passages l', and 8, and through the orifice 9, and continue down the chimney. At the base of most chimneys cleanout doors are provided, through which accumulations of chimney dirt may be removed from time to time.

I claim:

1. In a chimney discoloration preventer, in combination: a chimney formed as a hollow duct having interior and exterior surfaces; a supplementary duct of relatively short length formed with interior and exterior surfaces positioned with its outer end protrudingslightly above the top of the chimney andhaving its outer surface spacedrfrom the interior surface of the chimney; means for supporting the supplementary duct whereby soot collecting on the outer surface of the supplementary duct may wash entirely into the chimney.

2. In a chimney discoloration preventer, in combination: a chimney formed as a hollow duct having interior and exterior surfaces; a supplementary duct of relatively short length formed with interior and exterior surfaces positioned with its outer end protruding slightly above the top of the chimney and having its outer surface spaced from the interior surface of the chimney, said supplementary duct further formed with a cut out portion opening at the inner end thereof; a plate positioned within the free space of the chimney and formed with a central opening positioned directly beneath the supplementary duct, said plate supporting the said supplementary duct; means to support the plate in position whereby soot collecting on the outer surface of the supplementary duct may wash entirely down into the free space of the chimney and may pass through the said cut away portion and down and through the opening in said plate.

3. In a chimney discoloration preventer, in combination: a chimney formed as a hollow duct having interior surfaces forming a free space; a supplementary duct positioned within the free space of the chimney and having its upper end open to atmosphere and its outer surface spaced from the interior surface of the free space of the chimney and means to support said supplementary duct in position whereby soot collecting on the outer surface of the supplementary duct may wash entirely into the chimney; and means positioned on the top of the chimney for causing wash to be directed to the interior free space of the chimney.

4. In a chimney discoloration preventer, in combination: a chimney formed as a hollow duct having interior surfaces forming a free space; a supplementary duct positioned Within the free space of the chimney and having its upper end open to atmosphere above the top of the chimney and its outer surface spaced from the interior surface of the free space of the chimney and means to support said supplementary duct in position whereby soot collecting on the outer surface of the supplementary duct may wash entirely into the chimney.

5. In a chimney discoloration preventer, in combination: a chimney formed as a hollow duct having interior and exterior surfaces; a supplementary duct of relatively short length formed with interior and exterior surfaces positioned with its outer end protruding above the top of the chimney and having its outer surface spaced from the interior surface of the chimney, means for supporting the supplementary duct whereby soot collecting on the outer surface of the supplementary duct may wash entirely into the chimney.

6. As a chimney, two substantially concentric ducts, the inner duct being spaced from the outer and of relatively short length compared to the outer duct, and the top end protruding above the outer and means to support the inner duct and substantially-obstruct a flow of flue gas into the space between the inner and outer ducts adjacent the lower end of the inner duct.

ROBERT P. MORAN. 

